Antitheft bicycle rack



FIG. 1 is a perspective view of an antitheft bicycle rack, showing our new design;

FIG. 2 is a front elevational view thereof, the rear elevational view thereof being identical;

FIG. 3 is a top plan view thereof; and

FIG. 4 is a side elevational view thereof, the other side being identical. 

The ornamental design for an antitheft bicycle rack, as shown and described. 